1326318881320 has 16 divisors (see below), whose sum is σ = 2984217483060. Its totient is φ = 530527552512.

The previous prime is 1326318881311. The next prime is 1326318881353. The reversal of 1326318881320 is 231888136231.

It can be written as a sum of positive squares in 2 ways, for example, as 1244068082884 + 82250798436 = 1115378^2 + 286794^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16578985977 + ... + 16578986056.

Almost surely, 2^{1326318881320} is an apocalyptic number.

1326318881320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1326318881320 is an abundant number, since it is smaller than the sum of its proper divisors (1657898601740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1326318881320 is a wasteful number, since it uses less digits than its factorization.

1326318881320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33157972044 (or 33157972040 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 1326318881320 in words is "one trillion, three hundred twenty-six billion, three hundred eighteen million, eight hundred eighty-one thousand, three hundred twenty".